---
title: startMeasuring()
framework: xctest
role: symbol
role_heading: Instance Method
path: xctest/xctestcase/startmeasuring()
---

# startMeasuring()

Starts recording performance metrics within a block of code.

## Declaration

```swift
func startMeasuring()
```

## Discussion

Discussion Call this method to start the measurement of metrics by the measureMetrics(_:automaticallyStartMeasuring:for:) method. Measurement will start immediately after this method is called from within the measured block. note: You must call measureMetrics(_:automaticallyStartMeasuring:for:) with an automaticallyStartMeasuring value of false in order to set a custom start point with startMeasuring().

## See Also

### Measuring Performance

- [measure(_:)](xctest/xctestcase/measure(_:).md)
- [measureMetrics(_:automaticallyStartMeasuring:for:)](xctest/xctestcase/measuremetrics(_:automaticallystartmeasuring:for:).md)
- [measure(metrics:block:)](xctest/xctestcase/measure(metrics:block:).md)
- [measure(metrics:options:block:)](xctest/xctestcase/measure(metrics:options:block:).md)
- [measure(options:block:)](xctest/xctestcase/measure(options:block:).md)
- [stopMeasuring()](xctest/xctestcase/stopmeasuring().md)
- [defaultPerformanceMetrics](xctest/xctestcase/defaultperformancemetrics.md)
- [defaultMetrics](xctest/xctestcase/defaultmetrics.md)
- [defaultMeasureOptions](xctest/xctestcase/defaultmeasureoptions.md)
- [XCTPerformanceMetric](xctest/xctperformancemetric.md)